X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/c48916382a44a7a8d59ee4fa8342e6a85fc556ac..370ca01630bcc562f24d76ef1cdf4b95d77f9804:/blog/index.html diff --git a/blog/index.html b/blog/index.html index 234931a94b..3e773a0c13 100644 --- a/blog/index.html +++ b/blog/index.html @@ -20,39 +20,37 @@
-
Dokumentaren om Datalagringsdirektivet sendes endelig på NRK
-
26th March 2014
-

Foreningen NUUG melder i natt at -NRK nå har bestemt seg for -når -den norske dokumentarfilmen om datalagringsdirektivet skal -sendes (se IMDB -for detaljer om filmen) . Første visning blir på NRK2 mandag -2014-03-31 kl. 19:50, og deretter visninger onsdag 2014-04-02 -kl. 12:30, fredag 2014-04-04 kl. 19:40 og søndag 2014-04-06 kl. 15:10. -Jeg har sett dokumentaren, og jeg anbefaler enhver å se den selv. Som -oppvarming mens vi venter anbefaler jeg Bjørn Stærks kronikk i -Aftenposten fra i går, -Autoritær -gjøkunge, der han gir en grei skisse av hvor ille det står til med -retten til privatliv og beskyttelsen av demokrati i Norge og resten -verden, og helt riktig slår fast at det er vi i databransjen som -sitter med nøkkelen til å gjøre noe med dette. Jeg har involvert meg -i prosjektene dugnadsnett.no -og FreedomBox for å -forsøke å gjøre litt selv for å bedre situasjonen, men det er mye -hardt arbeid fra mange flere enn meg som gjenstår før vi kan sies å ha -gjenopprettet balansen.

- -

Jeg regner med at nettutgaven dukker opp på -NRKs -side om filmen om datalagringsdirektivet om frem dager. Hold et -øye med siden, og tips venner og slekt om at de også bør se den.

+ +
25th September 2014
+

I use the lsdvd tool +to handle my fairly large DVD collection. It is a nice command line +tool to get details about a DVD, like title, tracks, track length, +etc, in XML, Perl or human readable format. But lsdvd have not seen +any new development since 2006 and had a few irritating bugs affecting +its use with some DVDs. Upstream seemed to be dead, and in January I +sent a small probe asking for a version control repository for the +project, without any reply. But I use it regularly and would like to +get an updated version +into Debian. So two weeks ago I tried harder to get in touch with +the project admin, and after getting a reply from him explaining that +he was no longer interested in the project, I asked if I could take +over. And yesterday, I became project admin.

+ +

I've been in touch with a Gentoo developer and the Debian +maintainer interested in joining forces to maintain the upstream +project, and I hope we can get a new release out fairly quickly, +collecting the patches spread around on the internet into on place. +I've added the relevant Debian patches to the freshly created git +repository, and expect the Gentoo patches to make it too. If you got +a DVD collection and care about command line tools, check out +the git source and join +the project mailing +list. :)

@@ -60,102 +58,263 @@ side om filmen om datalagringsdirektivet om frem dager. Hold et
- -
25th March 2014
-

Did you ever need to store logs or other files in a way that would -allow it to be used as evidence in court, and needed a way to -demonstrate without reasonable doubt that the file had not been -changed since it was created? Or, did you ever need to document that -a given document was received at some point in time, like some -archived document or the answer to an exam, and not changed after it -was received? The problem in these settings is to remove the need to -trust yourself and your computers, while still being able to prove -that a file is the same as it was at some given time in the past.

- -

A solution to these problems is to have a trusted third party -"stamp" the document and verify that at some given time the document -looked a given way. Such -notarius service -have been around for thousands of years, and its digital equivalent is -called a -trusted -timestamping service. The Internet -Engineering Task Force standardised how such service could work a -few years ago as RFC -3161. The mechanism is simple. Create a hash of the file in -question, send it to a trusted third party which add a time stamp to -the hash and sign the result with its private key, and send back the -signed hash + timestamp. Both email, FTP and HTTP can be used to -request such signature, depending on what is provided by the service -used. Anyone with the document and the signature can then verify that -the document matches the signature by creating their own hash and -checking the signature using the trusted third party public key. -There are several commercial services around providing such -timestamping. A quick search for -"rfc 3161 -service" pointed me to at least -DigiStamp, -Quo -Vadis, -Global Sign -and Global -Trust Finder. The system work as long as the private key of the -trusted third party is not compromised.

- -

But as far as I can tell, there are very few public trusted -timestamp services available for everyone. I've been looking for one -for a while now. But yesterday I found one over at -Deutches -Forschungsnetz mentioned in -a -blog by David Müller. I then found -a -good recipe on how to use the service over at the University of -Greifswald.

- -

The OpenSSL library contain -both server and tools to use and set up your own signing service. See -the ts(1SSL), tsget(1SSL) manual pages for more details. The -following shell script demonstrate how to extract a signed timestamp -for any file on the disk in a Debian environment:

- -

+      
+      
21st September 2014
+

Rundt omkring i Oslo og Østlandsområdet henger det bokser over +veiene som jeg har lurt på hva gjør. De har ut fra plassering og +vinkling sett ut som bokser som sniffer ut et eller annet fra +forbipasserende trafikk, men det har vært uklart for meg hva det er de +leser av. Her om dagen tok jeg bilde av en slik boks som henger under +ei +skibru på Sollihøgda:

+ +

+ +

Boksen er tydelig merket «Kapsch >>>», logoen til +det sveitsiske selskapet Kapsch som +blant annet lager sensorsystemer for veitrafikk. Men de lager mye +forskjellig, og jeg kjente ikke igjen boksen på utseendet etter en +kjapp titt på produktlista til selskapet.

+ +

I og med at boksen henger over veien E16, en riksvei vedlikeholdt +av Statens Vegvesen, så antok jeg at det burde være mulig å bruke +REST-API-et som gir tilgang til vegvesenets database over veier, +skilter og annet veirelatert til å finne ut hva i alle dager dette +kunne være. De har både +en +datakatalog og +et +søk, der en kan søke etter ulike typer oppføringer innen for et +gitt geografisk område. Jeg laget et enkelt shell-script for å hente +ut antall av en gitt type innenfor området skibrua dekker, og listet +opp navnet på typene som ble funnet. Orket ikke slå opp hvordan +URL-koding av aktuelle strenger kunne gjøres mer generisk, og brukte +en stygg sed-linje i stedet.

+ +
 #!/bin/sh
-set -e
-url="http://zeitstempel.dfn.de"
-caurl="https://pki.pca.dfn.de/global-services-ca/pub/cacert/chain.txt"
-reqfile=$(mktemp -t tmp.XXXXXXXXXX.tsq)
-resfile=$(mktemp -t tmp.XXXXXXXXXX.tsr)
-cafile=chain.txt
-if [ ! -f $cafile ] ; then
-    wget -O $cafile "$caurl"
-fi
-openssl ts -query -data "$1" -cert | tee "$reqfile" \
-    | /usr/lib/ssl/misc/tsget -h "$url" -o "$resfile"
-openssl ts -reply -in "$resfile" -text 1>&2
-openssl ts -verify -data "$1" -in "$resfile" -CAfile "$cafile" 1>&2
-base64 < "$resfile"
-rm "$reqfile" "$resfile"
-

- -

The argument to the script is the file to timestamp, and the output -is a base64 encoded version of the signature to STDOUT and details -about the signature to STDERR. Note that due to -a bug -in the tsget script, you might need to modify the included script -and remove the last line. Or just write your own HTTP uploader using -curl. :) Now you too can prove and verify that files have not been -changed.

- -

But the Internet need more public trusted timestamp services. -Perhaps something for Uninett or -my work place the University of Oslo -to set up?

+urlmap() { + sed \ + -e 's/ / /g' -e 's/{/%7B/g' \ + -e 's/}/%7D/g' -e 's/\[/%5B/g' \ + -e 's/\]/%5D/g' -e 's/ /%20/g' \ + -e 's/,/%2C/g' -e 's/\"/%22/g' \ + -e 's/:/%3A/g' +} + +lookup() { + url="$1" + curl -s -H 'Accept: application/vnd.vegvesen.nvdb-v1+xml' \ + "https://www.vegvesen.no/nvdb/api$url" | xmllint --format - +} + +for id in $(seq 1 874) ; do + search="{ + lokasjon: { + bbox: \"10.34425,59.96386,10.34458,59.96409\", + srid: \"WGS84\" + }, + objektTyper: [{ + id: $id, antall: 10 + }] +}" + + query=/sok?kriterie=$(echo $search | urlmap) + if lookup "$query" | + grep -q '<totaltAntallReturnert>0<' + then + : + else + echo $id + lookup "/datakatalog/objekttyper/$id" |grep '^ <navn>' + fi +done + +exit 0 +
+ +Aktuelt ID-område 1-874 var riktig i datakatalogen da jeg laget +scriptet. Det vil endre seg over tid. Skriptet listet så opp +aktuelle typer i og rundt skibrua: + +
+5
+  <navn>Rekkverk</navn>
+14
+  <navn>Rekkverksende</navn>
+47
+  <navn>Trafikklomme</navn>
+49
+  <navn>Trafikkøy</navn>
+60
+  <navn>Bru</navn>
+79
+  <navn>Stikkrenne/Kulvert</navn>
+80
+  <navn>Grøft, åpen</navn>
+86
+  <navn>Belysningsstrekning</navn>
+95
+  <navn>Skiltpunkt</navn>
+96
+  <navn>Skiltplate</navn>
+98
+  <navn>Referansestolpe</navn>
+99
+  <navn>Vegoppmerking, langsgående</navn>
+105
+  <navn>Fartsgrense</navn>
+106
+  <navn>Vinterdriftsstrategi</navn>
+172
+  <navn>Trafikkdeler</navn>
+241
+  <navn>Vegdekke</navn>
+293
+  <navn>Breddemåling</navn>
+301
+  <navn>Kantklippareal</navn>
+318
+  <navn>Snø-/isrydding</navn>
+445
+  <navn>Skred</navn>
+446
+  <navn>Dokumentasjon</navn>
+452
+  <navn>Undergang</navn>
+528
+  <navn>Tverrprofil</navn>
+532
+  <navn>Vegreferanse</navn>
+534
+  <navn>Region</navn>
+535
+  <navn>Fylke</navn>
+536
+  <navn>Kommune</navn>
+538
+  <navn>Gate</navn>
+539
+  <navn>Transportlenke</navn>
+540
+  <navn>Trafikkmengde</navn>
+570
+  <navn>Trafikkulykke</navn>
+571
+  <navn>Ulykkesinvolvert enhet</navn>
+572
+  <navn>Ulykkesinvolvert person</navn>
+579
+  <navn>Politidistrikt</navn>
+583
+  <navn>Vegbredde</navn>
+591
+  <navn>Høydebegrensning</navn>
+592
+  <navn>Nedbøyningsmåling</navn>
+597
+  <navn>Støy-luft, Strekningsdata</navn>
+601
+  <navn>Oppgravingsdata</navn>
+602
+  <navn>Oppgravingslag</navn>
+603
+  <navn>PMS-parsell</navn>
+604
+  <navn>Vegnormalstrekning</navn>
+605
+  <navn>Værrelatert strekning</navn>
+616
+  <navn>Feltstrekning</navn>
+617
+  <navn>Adressepunkt</navn>
+626
+  <navn>Friksjonsmåleserie</navn>
+629
+  <navn>Vegdekke, flatelapping</navn>
+639
+  <navn>Kurvatur, horisontalelement</navn>
+640
+  <navn>Kurvatur, vertikalelement</navn>
+642
+  <navn>Kurvatur, vertikalpunkt</navn>
+643
+  <navn>Statistikk, trafikkmengde</navn>
+647
+  <navn>Statistikk, vegbredde</navn>
+774
+  <navn>Nedbøyningsmåleserie</navn>
+775
+  <navn>ATK, influensstrekning</navn>
+794
+  <navn>Systemobjekt</navn>
+810
+  <navn>Vinterdriftsklasse</navn>
+821
+  <navn>Funksjonell vegklasse</navn>
+825
+  <navn>Kurvatur, stigning</navn>
+838
+  <navn>Vegbredde, beregnet</navn>
+862
+  <navn>Reisetidsregistreringspunkt</navn>
+871
+  <navn>Bruksklasse</navn>
+
+ +

Av disse ser ID 775 og 862 mest relevant ut. ID 775 antar jeg +refererer til fotoboksen som står like ved brua, mens +«Reisetidsregistreringspunkt» kanskje kan være boksen som henger der. +Hvordan finner jeg så ut hva dette kan være for noe. En titt på +datakatalogsiden +for ID 862/Reisetidsregistreringspunkt viser at det er finnes 53 +slike målere i Norge, og hvor de er plassert, men gir ellers få +detaljer. Det er plassert 40 på østlandet og 13 i Trondheimsregionen. +Men siden nevner «AutoPASS», og hvis en slår opp oppføringen på +Sollihøgda nevner den «Ciber AS» som ID for eksternt system. (Kan det +være snakk om +Ciber +Norge AS, et selskap eid av Ciber Europe Bv?) Et nettsøk på + «Ciber AS autopass» fører meg til en artikkel fra NRK Trøndelag i + 2013 med tittel +«Sjekk +dette hvis du vil unngå kø». Artikkelen henviser til vegvesenets +nettside +reisetider.no +som har en +kartside +for Østlandet som viser at det måles mellom Sandvika og Sollihøgda. +Det kan dermed se ut til at jeg har funnet ut hva boksene gjør.

+ +

Hvis det stemmer, så er dette bokser som leser av AutoPASS-ID-en +til alle passerende biler med AutoPASS-brikke, og dermed gjør det mulig +for de som kontrollerer boksene å holde rede på hvor en gitt bil er +når den passerte et slikt målepunkt. NRK-artikkelen forteller at +denne informasjonen i dag kun brukes til å koble to +AutoPASS-brikkepasseringer passeringer sammen for å beregne +reisetiden, og at bruken er godkjent av Datatilsynet. Det er desverre +ikke mulig for en sjåfør som passerer under en slik boks å kontrollere +at AutoPASS-ID-en kun brukes til dette i dag og i fremtiden.

+ +

I tillegg til denne type AutoPASS-sniffere vet jeg at det også +finnes mange automatiske stasjoner som tar betalt pr. passering (aka +bomstasjoner), og der lagres informasjon om tid, sted og bilnummer i +10 år. Finnes det andre slike sniffere plassert ut på veiene?

+ +

Personlig har jeg valgt å ikke bruke AutoPASS-brikke, for å gjøre +det vanskeligere og mer kostbart for de som vil invadere privatsfæren +og holde rede på hvor bilen min beveger seg til enhver tid. Jeg håper +flere vil gjøre det samme, selv om det gir litt høyere private +utgifter (dyrere bompassering). Vern om privatsfæren koster i disse +dager.

+ +

Takk til Jan Kristian Jensen i Statens Vegvesen for tips om +dokumentasjon på vegvesenets REST-API.

@@ -163,54 +322,215 @@ to set up?

- -
21st March 2014
-

Keeping your DVD collection safe from scratches and curious -children fingers while still having it available when you want to see a -movie is not straight forward. My preferred method at the moment is -to store a full copy of the ISO on a hard drive, and use VLC, Popcorn -Hour or other useful players to view the resulting file. This way the -subtitles and bonus material are still available and using the ISO is -just like inserting the original DVD record in the DVD player.

- -

Earlier I used dd for taking security copies, but it do not handle -DVDs giving read errors (which are quite a few of them). I've also -tried using -dvdbackup -and genisoimage, but these days I use the marvellous python library -and program -python-dvdvideo -written by Bastian Blank. It is -in Debian -already and the binary package name is python3-dvdvideo. Instead -of trying to read every block from the DVD, it parses the file -structure and figure out which block on the DVD is actually in used, -and only read those blocks from the DVD. This work surprisingly well, -and I have been able to almost backup my entire DVD collection using -this method.

- -

So far, python-dvdvideo have failed on between 10 and -20 DVDs, which is a small fraction of my collection. The most common -problem is -DVDs -using UTF-16 instead of UTF-8 characters, which according to -Bastian is against the DVD specification (and seem to cause some -players to fail too). A rarer problem is what seem to be inconsistent -DVD structures, as the python library -claim -there is a overlap between objects. An equally rare problem claim -some -value is out of range. No idea what is going on there. I wish I -knew enough about the DVD format to fix these, to ensure my movie -collection will stay with me in the future.

- -

So, if you need to keep your DVDs safe, back them up using -python-dvdvideo. :)

+ +
16th September 2014
+

The Debian installer could be +a lot quicker. When we install more than 2000 packages in +Skolelinux / Debian Edu using +tasksel in the installer, unpacking the binary packages take forever. +A part of the slow I/O issue was discussed in +bug #613428 about too +much file system sync-ing done by dpkg, which is the package +responsible for unpacking the binary packages. Other parts (like code +executed by postinst scripts) might also sync to disk during +installation. All this sync-ing to disk do not really make sense to +me. If the machine crash half-way through, I start over, I do not try +to salvage the half installed system. So the failure sync-ing is +supposed to protect against, hardware or system crash, is not really +relevant while the installer is running.

+ +

A few days ago, I thought of a way to get rid of all the file +system sync()-ing in a fairly non-intrusive way, without the need to +change the code in several packages. The idea is not new, but I have +not heard anyone propose the approach using dpkg-divert before. It +depend on the small and clever package +eatmydata, which +uses LD_PRELOAD to replace the system functions for syncing data to +disk with functions doing nothing, thus allowing programs to live +dangerous while speeding up disk I/O significantly. Instead of +modifying the implementation of dpkg, apt and tasksel (which are the +packages responsible for selecting, fetching and installing packages), +it occurred to me that we could just divert the programs away, replace +them with a simple shell wrapper calling +"eatmydata $program $@", to get the same effect. +Two days ago I decided to test the idea, and wrapped up a simple +implementation for the Debian Edu udeb.

+ +

The effect was stunning. In my first test it reduced the running +time of the pkgsel step (installing tasks) from 64 to less than 44 +minutes (20 minutes shaved off the installation) on an old Dell +Latitude D505 machine. I am not quite sure what the optimised time +would have been, as I messed up the testing a bit, causing the debconf +priority to get low enough for two questions to pop up during +installation. As soon as I saw the questions I moved the installation +along, but do not know how long the question were holding up the +installation. I did some more measurements using Debian Edu Jessie, +and got these results. The time measured is the time stamp in +/var/log/syslog between the "pkgsel: starting tasksel" and the +"pkgsel: finishing up" lines, if you want to do the same measurement +yourself. In Debian Edu, the tasksel dialog do not show up, and the +timing thus do not depend on how quickly the user handle the tasksel +dialog.

+ +

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Machine/setupOriginal taskselOptimised taskselReduction
Latitude D505 Main+LTSP LXDE64 min (07:46-08:50)<44 min (11:27-12:11)>20 min 18%
Latitude D505 Roaming LXDE57 min (08:48-09:45)34 min (07:43-08:17)23 min 40%
Latitude D505 Minimal22 min (10:37-10:59)11 min (11:16-11:27)11 min 50%
Thinkpad X200 Minimal6 min (08:19-08:25)4 min (08:04-08:08)2 min 33%
Thinkpad X200 Roaming KDE19 min (09:21-09:40)15 min (10:25-10:40)4 min 21%

+ +

The test is done using a netinst ISO on a USB stick, so some of the +time is spent downloading packages. The connection to the Internet +was 100Mbit/s during testing, so downloading should not be a +significant factor in the measurement. Download typically took a few +seconds to a few minutes, depending on the amount of packages being +installed.

+ +

The speedup is implemented by using two hooks in +Debian +Installer, the pre-pkgsel.d hook to set up the diverts, and the +finish-install.d hook to remove the divert at the end of the +installation. I picked the pre-pkgsel.d hook instead of the +post-base-installer.d hook because I test using an ISO without the +eatmydata package included, and the post-base-installer.d hook in +Debian Edu can only operate on packages included in the ISO. The +negative effect of this is that I am unable to activate this +optimization for the kernel installation step in d-i. If the code is +moved to the post-base-installer.d hook, the speedup would be larger +for the entire installation.

+ +

I've implemented this in the +debian-edu-install +git repository, and plan to provide the optimization as part of the +Debian Edu installation. If you want to test this yourself, you can +create two files in the installer (or in an udeb). One shell script +need do go into /usr/lib/pre-pkgsel.d/, with content like this:

+ +

+#!/bin/sh
+set -e
+. /usr/share/debconf/confmodule
+info() {
+    logger -t my-pkgsel "info: $*"
+}
+error() {
+    logger -t my-pkgsel "error: $*"
+}
+override_install() {
+    apt-install eatmydata || true
+    if [ -x /target/usr/bin/eatmydata ] ; then
+        for bin in dpkg apt-get aptitude tasksel ; do
+            file=/usr/bin/$bin
+            # Test that the file exist and have not been diverted already.
+            if [ -f /target$file ] ; then
+                info "diverting $file using eatmydata"
+                printf "#!/bin/sh\neatmydata $bin.distrib \"\$@\"\n" \
+                    > /target$file.edu
+                chmod 755 /target$file.edu
+                in-target dpkg-divert --package debian-edu-config \
+                    --rename --quiet --add $file
+                ln -sf ./$bin.edu /target$file
+            else
+                error "unable to divert $file, as it is missing."
+            fi
+        done
+    else
+        error "unable to find /usr/bin/eatmydata after installing the eatmydata pacage"
+    fi
+}
+
+override_install
+

+ +

To clean up, another shell script should go into +/usr/lib/finish-install.d/ with code like this: + +

+#! /bin/sh -e
+. /usr/share/debconf/confmodule
+error() {
+    logger -t my-finish-install "error: $@"
+}
+remove_install_override() {
+    for bin in dpkg apt-get aptitude tasksel ; do
+        file=/usr/bin/$bin
+        if [ -x /target$file.edu ] ; then
+            rm /target$file
+            in-target dpkg-divert --package debian-edu-config \
+                --rename --quiet --remove $file
+            rm /target$file.edu
+        else
+            error "Missing divert for $file."
+        fi
+    done
+    sync # Flush file buffers before continuing
+}
+
+remove_install_override
+

+ +

In Debian Edu, I placed both code fragments in a separate script +edu-eatmydata-install and call it from the pre-pkgsel.d and +finish-install.d scripts.

+ +

By now you might ask if this change should get into the normal +Debian installer too? I suspect it should, but am not sure the +current debian-installer coordinators find it useful enough. It also +depend on the side effects of the change. I'm not aware of any, but I +guess we will see if the change is safe after some more testing. +Perhaps there is some package in Debian depending on sync() and +fsync() having effect? Perhaps it should go into its own udeb, to +allow those of us wanting to enable it to do so without affecting +everyone.

+ +

Update 2014-09-24: Since a few days ago, enabling this optimization +will break installation of all programs using gnutls because of +bug #702711. An updated +eatmydata package in Debian will solve it.

@@ -218,56 +538,62 @@ python-dvdvideo. :)

- -
16th March 2014
-

Det offentlige Norge har mye kunnskap og informasjon. Men hvordan -kan en få tilgang til den på en enkel måte? Takket være et lite -knippe lover og tilhørende forskrifter, blant annet -offentlighetsloven, -miljøinformasjonsloven -og -forvaltningsloven -har en rett til å spørre det offentlige og få svar. Men det finnes -intet offentlig arkiv over hva andre har spurt om, og dermed risikerer en -å måtte forstyrre myndighetene gang på gang for å få tak i samme -informasjonen på nytt. Britiske -mySociety har laget tjenesten -WhatDoTheyKnow som gjør -noe med dette. I Storbritannia blir WhatdoTheyKnow brukt i -ca -15% av alle innsynsforespørsler mot sentraladministrasjonen. -Prosjektet heter Alaveteli, og -er takk i bruk en rekke steder etter at løsningen ble generalisert og -gjort mulig å oversette. Den hjelper borgerne med å be om innsyn, -rådgir ved purringer og klager og lar alle se hvilke henvendelser som -er sendt til det offentlige og hvilke svar som er kommet inn, i et -søkpart arkiv. Her i Norge holder vi i foreningen NUUG på å få opp en -norsk utgave av Alaveteli, og her trenger vi din hjelp med -oversettelsen.

- -

Så langt er 76 % av Alaveteli oversatt til norsk bokmål, men vi -skulle gjerne vært oppe i 100 % før lansering. Oversettelsen gjøres -på Transifex, -der enhver som registrerer seg og ber om tilgang til -bokmålsoversettelsen får bidra. Vi har satt opp en test av tjenesten -(som ikke sender epost til det offentlige, kun til oss som holder på å -sette opp tjenesten) på maskinen -alaveteli-dev.nuug.no, der -en kan se hvordan de oversatte meldingen blir seende ut på nettsiden. -Når tjenesten lanseres vil den hete -Mimes brønn, etter -visdomskilden som Odin måtte gi øyet sitt for å få drikke i. Den -nettsiden er er ennå ikke klar til bruk.

- -

Hvis noen vil oversette til nynorsk også, så skal vi finne ut -hvordan vi lager en flerspråklig tjeneste. Men i første omgang er -fokus på bokmålsoversettelsen, der vi selv har nok peiling til å ha -fått oversatt 76%, men trenger hjelp for å komme helt i mål. :)

+ +
10th September 2014
+

Yesterday, I had the pleasure of attending a talk with the +Norwegian Unix User Group about +the +OpenPGP keyserver pool sks-keyservers.net, and was very happy to +learn that there is a large set of publicly available key servers to +use when looking for peoples public key. So far I have used +subkeys.pgp.net, and some times wwwkeys.nl.pgp.net when the former +were misbehaving, but those days are ended. The servers I have used +up until yesterday have been slow and some times unavailable. I hope +those problems are gone now.

+ +

Behind the round robin DNS entry of the +sks-keyservers.net service +there is a pool of more than 100 keyservers which are checked every +day to ensure they are well connected and up to date. It must be +better than what I have used so far. :)

+ +

Yesterdays speaker told me that the service is the default +keyserver provided by the default configuration in GnuPG, but this do +not seem to be used in Debian. Perhaps it should?

+ +

Anyway, I've updated my ~/.gnupg/options file to now include this +line:

+ +

+keyserver pool.sks-keyservers.net
+

+ +

With GnuPG version 2 one can also locate the keyserver using SRV +entries in DNS. Just for fun, I did just that at work, so now every +user of GnuPG at the University of Oslo should find a OpenGPG +keyserver automatically should their need it:

+ +

+% host -t srv _pgpkey-http._tcp.uio.no
+_pgpkey-http._tcp.uio.no has SRV record 0 100 11371 pool.sks-keyservers.net.
+%
+

+ +

Now if only +the +HKP lookup protocol supported finding signature paths, I would be +very happy. It can look up a given key or search for a user ID, but I +normally do not want that, but to find a trust path from my key to +another key. Given a user ID or key ID, I would like to find (and +download) the keys representing a signature path from my key to the +key in question, to be able to get a trust path between the two keys. +This is as far as I can tell not possible today. Perhaps something +for a future version of the protocol?

@@ -275,70 +601,116 @@ fått oversatt 76%, men trenger hjelp for å komme helt i mål. :)

- -
14th March 2014
-

The Freedombox -project is working on providing the software and hardware for -making it easy for non-technical people to host their data and -communication at home, and being able to communicate with their -friends and family encrypted and away from prying eyes. It has been -going on for a while, and is slowly progressing towards a new test -release (0.2).

- -

And what day could be better than the Pi day to announce that the -new version will provide "hard drive" / SD card / USB stick images for -Dreamplug, Raspberry Pi and VirtualBox (or any other virtualization -system), and can also be installed using a Debian installer preseed -file. The Debian based Freedombox is now based on Debian Jessie, -where most of the needed packages used are already present. Only one, -the freedombox-setup package, is missing. To try to build your own -boot image to test the current status, fetch the freedom-maker scripts -and build using -vmdebootstrap -with a user with sudo access to become root: - -

-git clone http://anonscm.debian.org/git/freedombox/freedom-maker.git \
-  freedom-maker
-sudo apt-get install git vmdebootstrap mercurial python-docutils \
-  mktorrent extlinux virtualbox qemu-user-static binfmt-support \
-  u-boot-tools
-make -C freedom-maker dreamplug-image raspberry-image virtualbox-image
-
- -

Root access is needed to run debootstrap and mount loopback -devices. See the README for more details on the build. If you do not -want all three images, trim the make line. But note that thanks to a race condition in -vmdebootstrap, the build might fail without the patch to the -kpartx call.

- -

If you instead want to install using a Debian CD and the preseed -method, boot a Debian Wheezy ISO and use this boot argument to load -the preseed values:

- -
-url=http://www.reinholdtsen.name/freedombox/preseed-jessie.dat
-
- -

But note that due to a -recently introduced bug in apt in Jessie, the installer will -currently hang while setting up APT sources. Killing the -'apt-cdrom ident' process when it hang a few times during the -installation will get the installation going. This affect all -installations in Jessie, and I expect it will be fixed soon.

- -

Give it a go and let us know how it goes on the mailing list, and help -us get the new release published. :) Please join us on -IRC (#freedombox on -irc.debian.org) and -the -mailing list if you want to help make this vision come true.

+ +
25th August 2014
+

Two years later, I am still not sure if it is legal here in Norway +to use or publish a video in H.264 or MPEG4 format edited by the +commercially licensed video editors, without limiting the use to +create "personal" or "non-commercial" videos or get a license +agreement with MPEG LA. If one +want to publish and broadcast video in a non-personal or commercial +setting, it might be that those tools can not be used, or that video +format can not be used, without breaking their copyright license. I +am not sure. +Back +then, I found that the copyright license terms for Adobe Premiere +and Apple Final Cut Pro both specified that one could not use the +program to produce anything else without a patent license from MPEG +LA. The issue is not limited to those two products, though. Other +much used products like those from Avid and Sorenson Media have terms +of use are similar to those from Adobe and Apple. The complicating +factor making me unsure if those terms have effect in Norway or not is +that the patents in question are not valid in Norway, but copyright +licenses are.

+ +

These are the terms for Avid Artist Suite, according to their +published +end user +license +text (converted to lower case text for easier reading):

+ +

+

18.2. MPEG-4. MPEG-4 technology may be included with the +software. MPEG LA, L.L.C. requires this notice:

+ +

This product is licensed under the MPEG-4 visual patent portfolio +license for the personal and non-commercial use of a consumer for (i) +encoding video in compliance with the MPEG-4 visual standard (“MPEG-4 +video”) and/or (ii) decoding MPEG-4 video that was encoded by a +consumer engaged in a personal and non-commercial activity and/or was +obtained from a video provider licensed by MPEG LA to provide MPEG-4 +video. No license is granted or shall be implied for any other +use. Additional information including that relating to promotional, +internal and commercial uses and licensing may be obtained from MPEG +LA, LLC. See http://www.mpegla.com. This product is licensed under +the MPEG-4 systems patent portfolio license for encoding in compliance +with the MPEG-4 systems standard, except that an additional license +and payment of royalties are necessary for encoding in connection with +(i) data stored or replicated in physical media which is paid for on a +title by title basis and/or (ii) data which is paid for on a title by +title basis and is transmitted to an end user for permanent storage +and/or use, such additional license may be obtained from MPEG LA, +LLC. See http://www.mpegla.com for additional details.

+ +

18.3. H.264/AVC. H.264/AVC technology may be included with the +software. MPEG LA, L.L.C. requires this notice:

+ +

This product is licensed under the AVC patent portfolio license for +the personal use of a consumer or other uses in which it does not +receive remuneration to (i) encode video in compliance with the AVC +standard (“AVC video”) and/or (ii) decode AVC video that was encoded +by a consumer engaged in a personal activity and/or was obtained from +a video provider licensed to provide AVC video. No license is granted +or shall be implied for any other use. Additional information may be +obtained from MPEG LA, L.L.C. See http://www.mpegla.com.

+

+ +

Note the requirement that the videos created can only be used for +personal or non-commercial purposes.

+ +

The Sorenson Media software have +similar terms:

+ +

+ +

With respect to a license from Sorenson pertaining to MPEG-4 Video +Decoders and/or Encoders: Any such product is licensed under the +MPEG-4 visual patent portfolio license for the personal and +non-commercial use of a consumer for (i) encoding video in compliance +with the MPEG-4 visual standard (“MPEG-4 video”) and/or (ii) decoding +MPEG-4 video that was encoded by a consumer engaged in a personal and +non-commercial activity and/or was obtained from a video provider +licensed by MPEG LA to provide MPEG-4 video. No license is granted or +shall be implied for any other use. Additional information including +that relating to promotional, internal and commercial uses and +licensing may be obtained from MPEG LA, LLC. See +http://www.mpegla.com.

+ +

With respect to a license from Sorenson pertaining to MPEG-4 +Consumer Recorded Data Encoder, MPEG-4 Systems Internet Data Encoder, +MPEG-4 Mobile Data Encoder, and/or MPEG-4 Unique Use Encoder: Any such +product is licensed under the MPEG-4 systems patent portfolio license +for encoding in compliance with the MPEG-4 systems standard, except +that an additional license and payment of royalties are necessary for +encoding in connection with (i) data stored or replicated in physical +media which is paid for on a title by title basis and/or (ii) data +which is paid for on a title by title basis and is transmitted to an +end user for permanent storage and/or use. Such additional license may +be obtained from MPEG LA, LLC. See http://www.mpegla.com for +additional details.

+ +

+ +

Some free software like +Handbrake and +FFMPEG uses GPL/LGPL licenses and do +not have any such terms included, so for those, there is no +requirement to limit the use to personal and non-commercial.

@@ -346,94 +718,167 @@ mailing list if you want to help make this vision come true.

- -
12th March 2014
-

On larger sites, it is useful to use a dedicated storage server for -storing user home directories and data. The design for handling this -in Debian Edu / Skolelinux, is -to update the automount rules in LDAP and let the automount daemon on -the clients take care of the rest. I was reminded about the need to -document this better when one of the customers of -Skolelinux Drift AS, where I am -on the board of directors, asked about how to do this. The steps to -get this working are the following:

- -

    - -
  1. Add new storage server in DNS. I use nas-server.intern as the -example host here.
  2. - -
  3. Add automoun LDAP information about this server in LDAP, to allow -all clients to automatically mount it on reqeust.
  4. - -
  5. Add the relevant entries in tjener.intern:/etc/fstab, because -tjener.intern do not use automount to avoid mounting loops.
  6. - -

- -

DNS entries are added in GOsa², and not described here. Follow the -instructions -in the manual (Machine Management with GOsa² in section Getting -started).

- -

Ensure that the NFS export points on the server are exported to the -relevant subnets or machines:

- -

-root@tjener:~# showmount -e nas-server
-Export list for nas-server:
-/storage         10.0.0.0/8
-root@tjener:~#
-

- -

Here everything on the backbone network is granted access to the -/storage export. With NFSv3 it is slightly better to limit it to -netgroup membership or single IP addresses to have some limits on the -NFS access.

- -

The next step is to update LDAP. This can not be done using GOsa², -because it lack a module for automount. Instead, use ldapvi and add -the required LDAP objects using an editor.

- -

-ldapvi --ldap-conf -ZD '(cn=admin)' -b ou=automount,dc=skole,dc=skolelinux,dc=no
-

- -

When the editor show up, add the following LDAP objects at the -bottom of the document. The "/&" part in the last LDAP object is a -wild card matching everything the nas-server exports, removing the -need to list individual mount points in LDAP.

- -

-add cn=nas-server,ou=auto.skole,ou=automount,dc=skole,dc=skolelinux,dc=no
-objectClass: automount
-cn: nas-server
-automountInformation: -fstype=autofs --timeout=60 ldap:ou=auto.nas-server,ou=automount,dc=skole,dc=skolelinux,dc=no
-
-add ou=auto.nas-server,ou=automount,dc=skole,dc=skolelinux,dc=no
-objectClass: top
-objectClass: automountMap
-ou: auto.nas-server
-
-add cn=/,ou=auto.nas-server,ou=automount,dc=skole,dc=skolelinux,dc=no
-objectClass: automount
-cn: /
-automountInformation: -fstype=nfs,tcp,rsize=32768,wsize=32768,rw,intr,hard,nodev,nosuid,noatime nas-server.intern:/&
-

- -

The last step to remember is to mount the relevant mount points in -tjener.intern by adding them to /etc/fstab, creating the mount -directories using mkdir and running "mount -a" to mount them.

- -

When this is done, your users should be able to access the files on -the storage server directly by just visiting the -/tjener/nas-server/storage/ directory using any application on any -workstation, LTSP client or LTSP server.

+ +
3rd August 2014
+

Lenge siden jeg har hatt tid til å publisere lenker til skriverier +jeg har hatt glede og nytte av av å lese. Her er en liten norsk +lenkesamling.

+ +

    + +
  • Sjøslag +om fiskemilliardene (NRK Ytring 2014-03-03) - litt om hvordan de +norske felles matressurser røves fra felleskapet.
  • + +
  • Matkrisen +kan komme til Norge (Aftenposten 2014-4-01) - hvordan miljøendringene vil gjøre matproduksjonen i Norge mer sÃ¥rbar.
  • + +
  • Norge +trenger kornlager (NRK Ytring 2014-06-07) Chr. Anton Smedshaug +forteller litt om Norges sÃ¥rbare matsituasjon etter at Staten solgte +Norges kornlager.
  • + +
  • PST +vil overvÃ¥ke datatastaturer (NRK 2014-03-04) - PST ønsker retten +til Ã¥ bryte seg inn pÃ¥ private PC-er og legge inn spionprogrammer. +Hvilket nok vil gjøre Linux mer populært, men gjør at en i enda mindre +grad enn i dag kan stole pÃ¥ datamaskiner - neppe en god ide for +samfunnet totalt sett.
  • + +
  • «Ruter +fremstÃ¥r som et pøbelvelde» (OsloBy 2014-03-05) - et eksempel pÃ¥ +hvordan kollektivtransportselskapet i Oslo hÃ¥ndterer sine kunder.
  • + +
  • Clear +Channel nektet Ã¥ vise Greenpeace-reklame i Oslo (Dagbladet +2014-03-05) - forteller litt om hvordan hvilke budskap som nÃ¥r ut i +det offentlige rom kontrolleres i Norge.
  • + +
  • Svarte +ikke pÃ¥ kritikken (Dagbladet 2014-03-06) - innlegg fra Norsk +presseforbund der de nok en gang tar opp det forkastelige i at +politiet nÃ¥ har full tilgang til Ã¥ bedrive telefonkontroll av +advokater.
  • + +
  • «Putin +spiller poker, ikke sjakk. I sjakk har man regler.» (Aftenposten +2014-03-08) - sjakklegenden Kasparov forklarer litt om hvordan han ser +at Russlands politikk fungerer, blant annet i lys av started av +Ukraina-krisen.
  • + +
  • I +seng med fienden (Aftenposten 2014-03-10) - kronikk fra Eirik +H. Vinje om hvordan menn og kvinner settes opp mot hverandre i det +offentlige ordskiftet, kanskje pÃ¥ sviktende grunnlag.
  • + +
  • Fritt +frem for skulk (Aftenposten 2014-03-14) - skildring av hvordan +norske elever i dag ikke lenger har rimelig krav om oppmøte pÃ¥ +skolen.
  • + +
  • «Datalagringsdirektiv» +avslørte abort, sykdom og vÃ¥penkjøp (Aftenposten 2014-03-14) - om +hvordan forskere har dokumentert hvordan innsamling av metadata om +telefoni og Internett-bruk kan være svært avslørende.
  • + +
  • Konsentrasjonssvikt +pÃ¥ pensum (Dagbladet 2014-03-14) - Kommentar om hvordan (feil) +bruk IKT i skolen kan ødelegge mer enn det bidrar til læring.
  • + +
  • Reservasjonsrettsstaten +(blogg fra Doremus 2014-02-09) - morsom beskrivelse om hvordan +regjeringens forslag til reservasjonsrett for leger kan utvides til Ã¥ +gjelde alles samvittighet.
  • + +
  • Autoritær +gjøkunge (Aftenposten 2014-03-25) - Kronikk av Bjørn Stærk om +snurpenots-overvÃ¥kningen som varsleren Snowden dokumenterte.
  • + +
  • Leveransekrise +i Offentlig sektor – mener Mike Bracken, Executive Director of Digital +in the Cabinet Office (blogg fra Friprog-senteret 2014-03-26).
  • + +
  • Norge +mÃ¥ stanse avlyttingen (Dagbladet 2014-03-26) - leserinnlegg fra +Felix Horne der han ber om at Norge gjør en innsats for Ã¥ fÃ¥ slutt pÃ¥ +overvÃ¥kning av innbyggerne som gjøres i Norge av Etiopiske +myndigheter.
  • + +
  • Demokrati +er ingen naturlig styreform (Aftenposten 2014-04-01) - kronikk av +Stein Ringen om hvordan demokrati som styreform gÃ¥r tapt nÃ¥r +innbyggerne tar det for gitt.
  • + +
  • Ytringsansvar +ere Enhver tilladte! (NRK Ytring 2014-04-01) - innspill fra Trygve +Svensson og Helge Svare om at hver enkelt av oss har et ansvar for Ã¥ +ytre oss i den offentlige debatten.
  • + +
  • Jeg +er ingen god samfunnsborger (Aftenposten 2014-04-16), kronikk av +Simen Tveitereid om alternative mÃ¥ter Ã¥ motiveres i samfunnet, uten Ã¥ +hige etter mer penger og flere ting.
  • + +
  • DLD-dommen: +Avgjørelsen fÃ¥r umiddelbar virkning (Aftenposten 2014-04-10) - +kronikk av Høyres Michael Tetzschner, en partiutbryter i DLD-saken som +stemte nei til DLD i Stortinget i 2011.
  • + +
  • Datalagringsdirektivets +endelikt (blogg fra John Wessel-Aas 2014-04-11) - oppsummering +av hvordan direktivet ble funnet ugyldig i EU-domstolen.
  • + +
  • Kronikk: +Kapitulasjonspresidenten (VG 2014-04-22) - kronikk av Einar +Kr. Steffenak om hvordan Stortingspresidenten og regjeringen viser sin +prinsippløshet i møte med Kina.
  • + +
  • Innerst +inne er alle nordmenn (Aftenposten 2014-04-27) - kronikk fra Bjørn +Stærk om hvordan vi i Vesten i stor grad baserer oss pÃ¥ en fantasi om +at alle i verden bærer pÃ¥ en drøm om Ã¥ bli som oss.
  • + +
  • Det +italienske senatet gav seg selv 134 milliarder euro i sluttpakke +(Aftenposten 2014-06-19) - forsker Simen Gaure forteller hvordan +løgner og fantasi fra nettkilder i stor grad blir akseptert som +sannhet - antagelig ogsÃ¥ av deg og meg.
  • + +
  • Et +forsvar for brÃ¥kmakerne (Dagbladet 2014-05-30) - kronikk av Dag +Øystein Nome som beskriver hvordan dagens skole ikke fungerer sÃ¥ godt +for mange elever.
  • + +
  • Betalte +med slitt seddel - havnet i arresten (Osloby 2014-06-25)) - +dokumentasjon av Oslopolitiets angrep pÃ¥ vÃ¥r alles rett til Ã¥ ferdes +uten elektronisk sporing. Jeg bruker kontanter i sÃ¥ stor grad som +mulig da banken ikke har noe med hvor jeg er og hva jeg kjøper. Vi +som gjør dette risikerer som beskrevet overgrep som frihetsberøvelse +og registrering og lagring av fingeravtrykk og bilde i politiets +database over mistenkte.
  • + +
  • Fredsprisen +til Snowden (Aftenposten 2014-06-28) - leder som forklarer hvorfor +varsleren Snowden bør fÃ¥ fredsprisen.
  • + +
  • Strategi +for politistaten (Dagbladet 2014-08-01) - leder som advarer om +sterke krefter som bruker terrortrusselen til Ã¥ lirke Norge nærmere Ã¥ +bli en politistat.
  • + +
  • Vi +mÃ¥ tenke nytt om narkotika (NRK Ytring 2014-08-03) - Mark Lewis +forklarer hvorfor legalisering og offentlig kontroll av +narkotikamarkedet er mye bedre enn Ã¥ overlate det til kriminelle.
  • + + +

@@ -441,97 +886,94 @@ workstation, LTSP client or LTSP server.

- -
7th March 2014
-

For noen uker siden ble NXCs fri programvarelisenserte -NOARK5-løsning -presentert hos -NUUG (video -på youtube -foreløbig), og det fikk meg til å titte litt mer på NOARK5, -standarden for arkivhåndtering i det offentlige Norge. Jeg lurer på -om denne kjernen kan være nyttig i et par av mine prosjekter, og for ett -av dem er det mest aktuelt å lagre epost. Jeg klarte ikke finne noen -anbefaling om hvordan RFC 822-formattert epost (aka Internett-epost) -burde lagres i NOARK5, selv om jeg vet at noen arkiver tar -PDF-utskrift av eposten med sitt epostprogram og så arkiverer PDF-en -(eller enda værre, tar papirutskrift og lagrer bildet av eposten som -PDF i arkivet).

- -

Det er ikke så mange formater som er akseptert av riksarkivet til -langtidsoppbevaring av offentlige arkiver, og PDF og XML er de mest -aktuelle i så måte. Det slo meg at det måtte da finnes en eller annen -egnet XML-representasjon og at det kanskje var enighet om hvilken som -burde brukes, så jeg tok mot til meg og spurte -SAMDOK, en gruppe tilknyttet -arkivverket som ser ut til å jobbe med NOARK-samhandling, om de hadde -noen anbefalinger: - -

-

Hei.

- -

Usikker på om dette er riktig forum å ta opp mitt spørsmål, men jeg -lurer på om det er definert en anbefaling om hvordan RFC -822-formatterte epost (aka vanlig Internet-epost) bør lages håndteres -i NOARK5, slik at en bevarer all informasjon i eposten -(f.eks. Received-linjer). Finnes det en anbefalt XML-mapping ala den -som beskrives på -<URL: https://www.informit.com/articles/article.aspx?p=32074 >? Mitt -mål er at det skal være mulig å lagre eposten i en NOARK5-kjerne og -kunne få ut en identisk formattert kopi av opprinnelig epost ved -behov.

-

- -

Postmottaker hos SAMDOK mente spørsmålet heller burde stilles -direkte til riksarkivet, og jeg fikk i dag svar derfra formulert av -seniorrådgiver Geir Ivar Tungesvik:

- -

-

Riksarkivet har ingen anbefalinger når det gjelder konvertering fra -e-post til XML. Det står arkivskaper fritt å eventuelt definere/bruke -eget format. Inklusive da - som det spørres om - et format der det er -mulig å re-etablere e-post format ut fra XML-en. XML (e-post) -dokumenter må være referert i arkivstrukturen, og det må vedlegges et -gyldig XML skjema (.xsd) for XML-filene. Arkivskaper står altså fritt -til å gjøre hva de vil, bare det dokumenteres og det kan dannes et -utrekk ved avlevering til depot.

- -

De obligatoriske kravene i Noark 5 standarden må altså oppfylles - -etter dialog med Riksarkivet i forbindelse med godkjenning. For -offentlige arkiv er det særlig viktig med filene loependeJournal.xml -og offentligJournal.xml. Private arkiv som vil forholde seg til Noark -5 standarden er selvsagt frie til å bruke det som er relevant for dem -av obligatoriske krav.

-

- -

Det ser dermed ut for meg som om det er et lite behov for å -standardisere XML-lagring av RFC-822-formatterte meldinger. Noen som -vet om god spesifikasjon i så måte? I tillegg til den omtalt over, -har jeg kommet over flere aktuelle beskrivelser (søk på "rfc 822 -xml", så finner du aktuelle alternativer).

- - - -

Finnes det andre og bedre spesifikasjoner for slik lagring? Send -meg en epost hvis du har innspill.

+ +
31st July 2014
+

The complete and free “out of the box” software solution for +schools, Debian Edu / +Skolelinux, is used quite a lot in Germany, and one of the people +involved is Bernd Zeitzen, who show up on the project mailing lists +from time to time with interesting questions and tips on how to adjust +the setup. I managed to interview him this summer.

+ +

Who are you, and how do you spend your days?

+ +

My name is Bernd Zeitzen and I'm married with Hedda, a self +employed physiotherapist. My former profession is tool maker, but I +haven't worked for 30 years in this job. 30 years ago I started to +support my wife and become her officeworker and a few years later the +administrator for a small computer network, today based on Ubuntu +Server (Samba, OpenVPN). For her daily work she has to use Windows +Desktops because the software she needs to organize her business only +works with Windows . :-(

+ +

In 1988 we started with one PC and DOS, then I learned to use +Windows 98, 2000, XP, …, 8, Ubuntu, MacOSX. Today we are running a +Linux server with 6 Windows clients and 10 persons (teacher of +children with special needs, speech therapist, occupational therapist, +psychologist and officeworkers) using our Samba shares via OpenVPN to +work with the documentations of our patients.

+ +

How did you get in contact with the Skolelinux / Debian Edu +project?

+ +

Two years ago a friend of mine asked me, if I want to get a job in +his school (Gymnasium +Harsewinkel). They started with Skolelinux / Debian Edu and they +were looking for people to give support to the teachers using the +software and the network and teaching the pupils increasing their +computer skills in optional lessons. I'm spending 4-6 hours a week +with this job.

+ +

What do you see as the advantages of Skolelinux / Debian +Edu?

+ +

The independence.

+ +

First: Every person is allowed to use, share and develop the +software. Even if you are poor, you are allowed to use the software +included in Skolelinux/Debian Edu and all the other Free Software.

+ +

Second: The software runs on old machines and this gives us the +possibility to recycle computers, weeded out from offices. The +servers and desktops are running for more than two years and they are +working reliable.

+ +

We have two servers (one tjener and one terminal server), 45 +workstations in three classrooms and seven laptops as a mobile +solution for all classrooms. These machines are all booting from the +terminal server. In the moment we are installing 30 laptops as mobile +workstations. Then the pupils have the possibility to work with these +machines in their classrooms. Internet access is realized by a WLAN +router, connected to the schools network. This is all done without a +dedicated system administrator or a computer science teacher.

+ +

What do you see as the disadvantages of Skolelinux / Debian +Edu?

+ +

Teachers and pupils are Windows users. <Irony on> And Linux +isn't cool. It's software for freaks using the command line. <Irony +off> They don't realize the stability of the system.

+ +

Which free software do you use daily?

+ +

Firefox, Thunderbird, LibreOffice, Ubuntu Server 12.04 (Samba, +Apache, MySQL, Joomla!, … and Skolelinux / Debian Edu)

+ +

Which strategy do you believe is the right one to use to +get schools to use free software?

+ +

In Germany we have the situation: every school is free to decide +which software they want to use. This decision is influenced by +teachers who learned to use Windows and MS Office. They buy a PC with +Windows preinstalled and an additional testing version of MS +Office. They don't know about the possibility to use Free Software +instead. Another problem are the publisher of school books. They +develop their software, added to the school books, for Windows.

@@ -539,110 +981,39 @@ meg en epost hvis du har innspill.

- -
28th February 2014
-

Her er noen lenker til tekster jeg har satt pris på å lese de siste -månedene. Det er mye om varsleren Edward Snowden, som burde få all -hjelp, støtte og beskyttelse Norge kan stille opp med for å ha satt -totalitær overvåkning på sakskartet, men også endel annet -tankevekkende og interessant.

- - + +
23rd July 2014
+

This summer I finally had time to continue working on the Norwegian +docbook version of the 2004 book +Free Culture by Lawrence Lessig, +to get a Norwegian text explaining the problems with todays copyright +law. Yesterday, I finally completed translated the book text. There +are still some foot/end notes left to translate, the colophon page +need to be rewritten, and a few words and phrases still need to be +translated, but the Norwegian text is ready for the first proof +reading. :) More spell checking is needed, and several illustrations +need to be cleaned up. The work stopped up because I had to give +priority to other projects the last year, and the progress graph of +the translation show this very well:

+ +

+ +

If you want to read the result, check out the +github +project pages and the +PDF, +EPUB +and HTML version available in the +archive +directory.

+ +

Please report typos, bugs and improvements to the github project if +you find any.

@@ -650,37 +1021,111 @@ på hasjbrukere - aftenposten.no
- -
22nd February 2014
-

Many years ago, I wrote a GPL licensed version of the netgroup and -innetgr tools, because I needed them in -Skolelinux. I called the project -ng-utils, and it has served me well. I placed the project under the -Hungry Programmer umbrella, and it was maintained in our CVS -repository. But many years ago, the CVS repository was dropped (lost, -not migrated to new hardware, not sure), and the project have lacked a -proper home since then.

- -

Last summer, I had a look at the package and made a new release -fixing a irritating crash bug, but was unable to store the changes in -a proper source control system. I applied for a project on -Alioth, but did not have time -to follow up on it. Until today. :)

- -

After many hours of cleaning and migration, the ng-utils project -now have a new home, and a git repository with the highlight of the -history of the project. I published all release tarballs and imported -them into the git repository. As the project is really stable and not -expected to gain new features any time soon, I decided to make a new -release and call it 1.0. Visit the new project home on -https://alioth.debian.org/projects/ng-utils/ -if you want to check it out. The new version is also uploaded into -Debian Unstable.

+ +
17th June 2014
+

The Debian Edu / Skolelinux +project provide an instruction manual for teachers, system +administrators and other users that contain useful tips for setting up +and maintaining a Debian Edu installation. This text is about how the +text processing of this manual is handled in the project.

+ +

One goal of the project is to provide information in the native +language of its users, and for this we need to handle translations. +But we also want to make sure each language contain the same +information, so for this we need a good way to keep the translations +in sync. And we want it to be easy for our users to improve the +documentation, avoiding the need to learn special formats or tools to +contribute, and the obvious way to do this is to make it possible to +edit the documentation using a web browser. We also want it to be +easy for translators to keep the translation up to date, and give them +help in figuring out what need to be translated. Here is the list of +tools and the process we have found trying to reach all these +goals.

+ +

We maintain the authoritative source of our manual in the +Debian +wiki, as several wiki pages written in English. It consist of one +front page with references to the different chapters, several pages +for each chapter, and finally one "collection page" gluing all the +chapters together into one large web page (aka +the +AllInOne page). The AllInOne page is the one used for further +processing and translations. Thanks to the fact that the +MoinMoin installation on +wiki.debian.org support exporting pages in +the Docbook format, we can fetch +the list of pages to export using the raw version of the AllInOne +page, loop over each of them to generate a Docbook XML version of the +manual. This process also download images and transform image +references to use the locally downloaded images. The generated +Docbook XML files are slightly broken, so some post-processing is done +using the documentation/scripts/get_manual program, and the +result is a nice Docbook XML file (debian-edu-wheezy-manual.xml) and +a handfull of images. The XML file can now be used to generate PDF, HTML +and epub versions of the English manual. This is the basic step of +our process, making PDF (using dblatex), HTML (using xsltproc) and +epub (using dbtoepub) version from Docbook XML, and the resulting files +are placed in the debian-edu-doc-en binary package.

+ +

But English documentation is not enough for us. We want translated +documentation too, and we want to make it easy for translators to +track the English original. For this we use the +poxml package, +which allow us to transform the English Docbook XML file into a +translation file (a .pot file), usable with the normal gettext based +translation tools used by those translating free software. The pot +file is used to create and maintain translation files (several .po +files), which the translations update with the native language +translations of all titles, paragraphs and blocks of text in the +original. The next step is combining the original English Docbook XML +and the translation file (say debian-edu-wheezy-manual.nb.po), to +create a translated Docbook XML file (in this case +debian-edu-wheezy-manual.nb.xml). This translated (or partly +translated, if the translation is not complete) Docbook XML file can +then be used like the original to create a PDF, HTML and epub version +of the documentation.

+ +

The translators use different tools to edit the .po files. We +recommend using +lokalize, +while some use emacs and vi, others can use web based editors like +Poodle or +Transifex. All we care about +is where the .po file end up, in our git repository. Updated +translations can either be committed directly to git, or submitted as +bug reports +against the debian-edu-doc package.

+ +

One challenge is images, which both might need to be translated (if +they show translated user applications), and are needed in different +formats when creating PDF and HTML versions (epub is a HTML version in +this regard). For this we transform the original PNG images to the +needed density and format during build, and have a way to provide +translated images by storing translated versions in +images/$LANGUAGECODE/. I am a bit unsure about the details here. The +package maintainers know more.

+ +

If you wonder what the result look like, we provide +the content +of the documentation packages on the web. See for example the +Italian +PDF version or the +German +HTML version. We do not yet build the epub version by default, +but perhaps it will be done in the future.

+ +

To learn more, check out +the +debian-edu-doc package, +the +manual on the wiki and +the +translation instructions in the manual.

- Tags: debian, english. + Tags: debian, debian edu, docbook, english.
@@ -688,113 +1133,57 @@ if you want to check it out. The new version is also uploaded into
- -
3rd February 2014
-

A few days ago I decided to try to help the Hurd people to get -their changes into sysvinit, to allow them to use the normal sysvinit -boot system instead of their old one. This follow up on the -great -Google Summer of Code work done last summer by Justus Winter to -get Debian on Hurd working more like Debian on Linux. To get started, -I downloaded a prebuilt hard disk image from -http://ftp.debian-ports.org/debian-cd/hurd-i386/current/debian-hurd.img.tar.gz, -and started it using virt-manager.

- -

The first think I had to do after logging in (root without any -password) was to get the network operational. I followed -the -instructions on the Debian GNU/Hurd ports page and ran these -commands as root to get the machine to accept a IP address from the -kvm internal DHCP server:

- -

-settrans -fgap /dev/netdde /hurd/netdde
-kill $(ps -ef|awk '/[p]finet/ { print $2}')
-kill $(ps -ef|awk '/[d]evnode/ { print $2}')
-dhclient /dev/eth0
-

- -

After this, the machine had internet connectivity, and I could -upgrade it and install the sysvinit packages from experimental and -enable it as the default boot system in Hurd.

- -

But before I did that, I set a password on the root user, as ssh is -running on the machine it for ssh login to work a password need to be -set. Also, note that a bug somewhere in openssh on Hurd block -compression from working. Remember to turn that off on the client -side.

- -

Run these commands as root to upgrade and test the new sysvinit -stuff:

- -

-cat > /etc/apt/sources.list.d/experimental.list <<EOF
-deb http://http.debian.net/debian/ experimental main
-EOF
-apt-get update
-apt-get dist-upgrade
-apt-get install -t experimental initscripts sysv-rc sysvinit \
-    sysvinit-core sysvinit-utils
-update-alternatives --config runsystem
-

- -

To reboot after switching boot system, you have to use -reboot-hurd instead of just reboot, as there is not -yet a sysvinit process able to receive the signals from the normal -'reboot' command. After switching to sysvinit as the boot system, -upgrading every package and rebooting, the network come up with DHCP -after boot as it should, and the settrans/pkill hack mentioned at the -start is no longer needed. But for some strange reason, there are no -longer any login prompt in the virtual console, so I logged in using -ssh instead. - -

Note that there are some race conditions in Hurd making the boot -fail some times. No idea what the cause is, but hope the Hurd porters -figure it out. At least Justus said on IRC (#debian-hurd on -irc.debian.org) that they are aware of the problem. A way to reduce -the impact is to upgrade to the Hurd packages built by Justus by -adding this repository to the machine:

- -

-cat > /etc/apt/sources.list.d/hurd-ci.list <<EOF
-deb http://darnassus.sceen.net/~teythoon/hurd-ci/ sid main
-EOF
-

- -

At the moment the prebuilt virtual machine get some packages from -http://ftp.debian-ports.org/debian, because some of the packages in -unstable do not yet include the required patches that are lingering in -BTS. This is the completely list of "unofficial" packages installed:

- -

-# aptitude search '?narrow(?version(CURRENT),?origin(Debian Ports))'
-i   emacs                   - GNU Emacs editor (metapackage)
-i   gdb                     - GNU Debugger
-i   hurd-recommended        - Miscellaneous translators
-i   isc-dhcp-client         - ISC DHCP client
-i   isc-dhcp-common         - common files used by all the isc-dhcp* packages
-i   libc-bin                - Embedded GNU C Library: Binaries
-i   libc-dev-bin            - Embedded GNU C Library: Development binaries
-i   libc0.3                 - Embedded GNU C Library: Shared libraries
-i A libc0.3-dbg             - Embedded GNU C Library: detached debugging symbols
-i   libc0.3-dev             - Embedded GNU C Library: Development Libraries and Hea
-i   multiarch-support       - Transitional package to ensure multiarch compatibilit
-i A x11-common              - X Window System (X.Org) infrastructure
-i   xorg                    - X.Org X Window System
-i A xserver-xorg            - X.Org X server
-i A xserver-xorg-input-all  - X.Org X server -- input driver metapackage
-#
-

- -

All in all, testing hurd has been an interesting experience. :) -X.org did not work out of the box and I never took the time to follow -the porters instructions to fix it. This time I was interested in the -command line stuff.

+

+
16th June 2014
+

Jeg har fortsatt behov for å kunne laste ned innslag fra NRKs +nettsted av og til for å se senere når jeg ikke er på nett, men +min +oppskrift fra 2011 sluttet å fungere da NRK byttet +avspillermetode. I dag fikk jeg endelig lett etter oppdatert løsning, +og jeg er veldig glad for å fortelle at den enkleste måten å laste ned +innslag er å bruke siste versjon 2014.06.07 av +youtube-dl. Støtten i +youtube-dl kom +inn for 23 dager siden og +versjonen i +Debian fungerer fint også som backport til Debian Wheezy. Det er +et lite problem, det håndterer kun URLer med små bokstaver, men hvis +en har en URL med store bokstaver kan en bare gjøre alle store om til +små bokstaver for å få youtube-dl til å laste ned. Rapporterte +nettopp +problemet til +utviklerne, og antar de får fikset det snart.

+ +

Dermed er alt klart til å laste ned dokumentarene om +USAs +hemmelige avlytting og +Selskapene +bak USAs avlytting, i tillegg til +intervjuet +med Edward Snowden gjort av den tyske tv-kanalen ARD. Anbefaler +alle å se disse, sammen med +foredraget +til Jacob Appelbaum på siste CCC-konferanse, for å forstå mer om +hvordan overvåkningen av borgerne brer om seg.

+ +

Takk til gode venner på foreningen NUUGs IRC-kanal +#nuug på irc.freenode.net +for tipsene som fikk meg i mål.

+ +

Oppdatering 2014-06-17: Etter at jeg publiserte +denne, ble jeg tipset om bloggposten +"Downloading +HD content from tv.nrk.no" av Ingvar Hagelund, som har alternativ +implementasjon og tips for å lage mkv-fil med undertekstene inkludert. +Kanskje den passer bedre for deg? I tillegg ble feilen i youtube-dl +ble fikset litt senere ut på dagen i går, samt at youtube-dl fikk +støtte for å laste ned undertitler. Takk til Anders Einar Hilden for +god innsats og youtube-dl-utviklerne for rask respons.

- Tags: bootsystem, debian, english. + Tags: multimedia, norsk, video, web.
@@ -816,7 +1205,19 @@ command line stuff.

  • February (3)
  • -
  • March (7)
  • +
  • March (8)
  • + +
  • April (7)
  • + +
  • May (1)
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  • @@ -997,45 +1398,47 @@ command line stuff.

  • chrpath (2)
  • -
  • debian (95)
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  • debian (102)
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  • debian edu (145)
  • +
  • debian edu (149)
  • digistan (10)
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  • drivstoffpriser (4)
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  • +
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  • @@ -1043,15 +1446,17 @@ command line stuff.

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  • @@ -1061,29 +1466,29 @@ command line stuff.

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  • +
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